A Quality Analyst wants to construct a control chart for determining whether four machines,all producing the same product,are under control with regard to a particular quality attribute.Accordingly,she inspected 1,000 units of output from each machine in random samples,with the following results: If upper and lower control limits were set as 0.028 and 0.010,which machine(s),if any,appear(s)to be out-of-control for process proportion of defectives?
A)Machine #3 only
B)Machine #4 only
C)Machines #3 and #4
D)Machines #2 and #3

Question

A Quality Analyst wants to construct a control chart for determining whether four machines,all producing the same product,are under control with regard to a particular quality attribute.Accordingly,she inspected 1,000 units of output from each machine in random samples,with the following results:  If upper and lower control limits were set as 0.028 and 0.010,which machine(s),if any,appear(s)to be out-of-control for process proportion of defectives?
A)Machine #3 only 
B)Machine #4 only 
C)Machines #3 and #4 
D)Machines #2 and #3

Quizplus · Accepted Answer

The Answer of A Quality Analyst wants to construct a control chart for determining whether four machines,all producing the same product,are under control with regard to a particular quality attribute.Accordingly,she inspected 1,000 units of output from each machine in random samples,with the following results:  If upper and lower control limits were set as 0.028 and 0.010,which machine(s),if any,appear(s)to be out-of-control for process proportion of defectives?
A)Machine #3 only 
B)Machine #4 only 
C)Machines #3 and #4 
D)Machines #2 and #3

A Quality Analyst Wants to Construct a Control Chart for Determining